A certain mass of dry air with = 1.4 at NTP is expanded to three times its volume under adiabatic conditions then the resulting pressure is
A) 0.215
atm
B) 1.215atm
C) 4.655atm
D) 0.655atm

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage

Abanked road comer of radius 146 m is to be constructed. if the comer is designed for vehicles moving with a speed of 20.0 m/s, what should the banking angle be, in units of degrees?

Aphysical change is a change in the size, shape,, or stafe of matter true or false